>> Mark explained this idea to me in Pittsburgh and once I finally
>> understood it, it seemed extremely useful at a very low cost.
>> Essentially, you'd leave the A6 records for the shortest global
>> prefixes alone, but put site-local and, if you wish, link-local
>> prefixes into your DNS, putting a DNS name of your choice into the
>> final A6 record with prefix length=0. Example:
>> $ORIGIN example.com.
>> myhost A6 64 ::1234:5678:9abc:def0 subnet-one.ip6
>> subnet-one.ip6 A6 48 0:0:0:1:: ip6
>> A6 0 fe80:0:0:: link-one
>> ip6 A6 48 0::0 example-com-usa.ip6.my-isp.net.
>> A6 0 fec0:0:0:: usa-hq
>> yourhost A6 64 ::0246:8ace:1357:9bdf subnet-two.ip6
>> subnet-two.ip6 A6 48 0:0:0:2:: ip6
>> A6 0 fe80:0:0:: link-two
>> herhost A6 64 ::048c:159d:26ae:37bf subnet-eins.ip6
>> subnet-eins.ip6 A6 48 0:0:0:1 ip6de
>> A6 0 fe80:0:0:: link-eins
>> ip6de A6 48 0::0 example-com-de.ip6.andere-isp.de.
>> A6 0 fec0:0:0:: de-site
>> usa-hq TXT "There need not be any record at this label."
>> de-hq TXT "There need not be any record at this label either."
>>
>> So now if myhost looks up yourhost it gets a site-local address as
>> well as a global address. The last RR of yourhost's site-local A6
>> chain has the same "prefix name" field as the last RR of myhost's
>> site-local A6 chain, so myhost can conclude that yourhost is on the
>> same site. Similarly, it can conclude that yourhost is not on the
>> same link as my host, and that herhost is not on the same link or
>> site.
Matt, did you intentionally pick linklocal address as the example
above? I don't think you should put linklocal address onto globally
reachable DNS name tree. even site-local is questionable too.
or do you expect some magical code in name server to filter fe80::
prefixes out from remote queries?
itojun
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